.cate-nav{
    position: relative;
    float: left;
    height: 100%;
    width: 90px;
    // background-color: yellow;
    ul {
        li {
            a {
                display: block;
                width: 90px;
                height: 50px;
                line-height: 50px;
                text-align: center;
                border-right: 1px solid red;
                border-bottom: 1px solid red;
            }
        }
        .current {
            a {
                border-right:none;
                color: red;
            }
        }
    }
    
}

.cate-content {
    position: relative;
    height: 100%; 
    overflow: hidden;
    ul {
        li {
            margin-top: 10px;
            float: left;
            width: 33.33%;
            text-align: center;
            img {
                width: 70%;
            }
        }
    }
}